两张路由表(FIB)的内容

local表
: the fib table id: RT_TABLE_LOCAL, stamp: 0
:  the array of zone in hash table:
:  hash 8: have an fib_node list:
:      entries: 1
:      hash divisor: 16
:      hash mask: f
:      zone order: 8
:      zone mask: ff
:  hash 32: have an fib_node list:
:      entries: 6
:      hash divisor: 16
:      hash mask: f
:      zone order: 32
:      zone mask: ffffffff
:
:  the zone list:
:      zone: hash 32
:          the key ip: 172.16.48.255
:          the alias:
:              fa tos: 0                //一般服务
:              fa type: RTN_BROADCAST
:              fa scope: RT_SCOPE_LINK
:              fa state: 0              //未设
:              the fa info:
:                  tree ref: 3
:                  clnt ref: 1
:                  fib_dead: 0          //状态活
:                  fib flags: 0         //未设
:                  protocol: RTPROT_KERNEL
:                  pref src: 172.16.48.2
:                  priority: 0          //未设
:                  fib_mtu: 0           //均未设
:                  fib_window: 0
:                  fib_power: 0
:                  fib_nhs: 1           //未设，缺省为1。
:                  all the nhs:
:                      0.16.48.2
:
:          the key ip: 127.255.255.255
:          the alias:
:              fa tos: 0
:              fa type: RTN_BROADCAST
:              fa scope: RT_SCOPE_LINK
:              fa state: 0
:              the fa info:
:                  tree ref: 2
:                  clnt ref: 1
:                  fib_dead: 0
:                  fib flags: 0
:                  protocol: RTPROT_KERNEL
:                  pref src: 127.0.0.1.
:                  priority: 0
:                  fib_mtu: 0
:                  fib_window: 0
:                  fib_power: 0
:                  fib_nhs: 1
:                  all the nhs:
:                      0.0.0.1
:
:          the key ip: 172.16.48.0
:          the alias:
:              fa tos: 0
:              fa type: RTN_BROADCAST
:              fa scope: RT_SCOPE_LINK
:              fa state: 0
:              the fa info:
:                  tree ref: 3
:                  clnt ref: 1
:                  fib_dead: 0
:                  fib flags: 0
:                  protocol: RTPROT_KERNEL
:                  pref src: 172.16.48.2
:                  priority: 0
:                  fib_mtu: 0
:                  fib_window: 0
:                  fib_power: 0
:                  fib_nhs: 1
:                  all the nhs:
:                      0.16.48.2
:
:          the key ip: 172.16.48.2
:          the alias:
:              fa tos: 0
:              fa type: RTN_LOCAL
:              fa scope: RT_SCOPE_HOST
:              fa state: FA_S_ACCESSED
:              the fa info:
:                  tree ref: 1
:                  clnt ref: 1
:                  fib_dead: 0
:                  fib flags: 0
:                  protocol: RTPROT_KERNEL
:                  pref src: 172.16.48.2
:                  priority: 0
:                  fib_mtu: 0
:                  fib_window: 0
:                  fib_power: 0
:                  fib_nhs: 1
:                  all the nhs:
:                      0.16.48.2
:
:          the key ip: 127.0.0.0
:          the alias:
:              fa tos: 0
:              fa type: RTN_BROADCAST
:              fa scope: RT_SCOPE_LINK
:              fa state: 0
:              the fa info:
:                  tree ref: 2
:                  clnt ref: 1
:                  fib_dead: 0
:                  fib flags: 0
:                  protocol: RTPROT_KERNEL
:                  pref src: 127.0.0.1.
:                  priority: 0
:                  fib_mtu: 0
:                  fib_window: 0
:                  fib_power: 0
:                  fib_nhs: 1
:                  all the nhs:
:                      0.0.0.1
:
:          the key ip: 127.0.0.1
:          the alias:
:              fa tos: 0
:              fa type: RTN_LOCAL
:              fa scope: RT_SCOPE_HOST
:              fa state: FA_S_ACCESSED
:              the fa info:
:                  tree ref: 2
:                  clnt ref: 1
:                  fib_dead: 0
:                  fib flags: 0
:                  protocol: RTPROT_KERNEL
:                  pref src: 127.0.0.1.
:                  priority: 0
:                  fib_mtu: 0
:                  fib_window: 0
:                  fib_power: 0
:                  fib_nhs: 1
:                  all the nhs:
:                      0.0.0.1
:
:      zone: hash 8
:          the key ip: 127.0.0.0
:          the alias:
:              fa tos: 0
:              fa type: RTN_BROADCAST
:              fa scope: RT_SCOPE_HOST
:              fa state: 0
:              the fa info:
:                  tree ref: 2
:                  clnt ref: 1
:                  fib_dead: 0
:                  fib flags: 0
:                  protocol: RTPROT_KERNEL
:                  pref src: 127.0.0.1.
:                  priority: 0
:                  fib_mtu: 0
:                  fib_window: 0
:                  fib_power: 0
:                  fib_nhs: 1
:                  all the nhs:
:                      0.0.0.1

main表：
:  the fib table id: RT_TABLE_MAIN, stamp: 0
:  the array of zone in hash table:
:  hash 24: have an object!
:      entries: 1
:      hash divisor: 16
:      hash mask: f
:      zone order: 24
:      zone mask: ffffff
:
:  the zone list:
:      zone: hash 24
:          the key ip: 172.16.48.0
:          the alias:
:              fa tos: 0
:              fa type: RTN_UNICAST
:              fa scope: RT_SCOPE_LINK
:              fa state: 0
:              the fa info:
:                  tree ref: 3
:                  clnt ref: 1
:                  fib_dead: 0
:                  fib flags: 0
:                  protocol: RTPROT_KERNEL
:                  pref src: 172.16.48.2.
:                  priority: 0
:                  fib_mtu: 0
:                  fib_window: 0
:                  fib_power: 0
:                  fib_nhs: 1
:                  all the nhs:
:                      0.16.48.2

系统网络配置：
eth0      Link encap:Ethernet  HWaddr 00:0C:29:80:D8:70
          inet addr:172.16.48.2  Bcast:172.16.48.255  Mask:255.255.255.0
          inet6 addr: fe80::20c:29ff:fe80:d870/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:487 errors:0 dropped:0 overruns:0 frame:0
          TX packets:338 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:46408 (45.3 KiB)  TX bytes:55085 (53.7 KiB)
          Interrupt:17 Base address:0x1400

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:8 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:560 (560.0 b)  TX bytes:560 (560.0 b)